BACK-UP ELECTRCIAL HEATER SYSTEM (if supplied)
Symptom | Probable Cause | Corrective Action / Remedy |
No hot water | Circuit breaker tripped at source. | Reset circuit breaker. |
| High limit switch tripped. | Reset high limit switch. |
| Loose wires. | Tighten wires. Torque screws per torque |
|
| chart included in Section VI. |
| Heating element inoperable. | Check heating element operation by |
|
| clamping an Amprobe around each wire to |
|
| the element. The ampere reading should |
|
| agree with the nameplate ‘AMP’ figure. |
| Low line voltage. | Have source electrical system checked by |
|
| an electrician. |
| Faulty thermostat. | Move thermostat dial through full range. A |
|
| definite ‘click’ should be heard. If not, |
|
| replace thermostat. |
Water temperature | Faulty thermostat. | Check thermostat adjustment. Monitor |
below settings at all |
| thermostat as described in Section III, |
times |
| Quarterly Inspection. Replace if necessary. |
| Heating element not working on | Check to see that heating element is |
| all phases | working on all phases, by checking the |
|
| resistance (ohms) value for each element |
|
| and comparing with expected rating. |
| Heater improperly sized | Verify heater is properly sized for the flow |
|
| rate and temperature rise of your system. |
|
| Replace elements with proper size as |
|
| necessary. |
Relief valve | Excessive temperature or | Temperature and pressure relief valves are |
discharges | pressure in tank | made to operate if the water temperature |
continuously |
| exceeds 210°F or water pressure exceeds |
|
| the pressure rating of the safety relief valve. |
|
| If trouble is excessive temperature, then |
|
| thermostat is not shutting off at the right |
|
| setting and thermostat must be replaced. |
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